The following CLDR Target=Modern locales are missing collation data. Note: It may be that the UCA is sufficient, that needs investigation.
Javanese (also missing casing)
CLDR Target levels:
The following locales look like candidates for a higher CLDR Target level.
chr Cherokee: should add ordinals*, romanization*
gd Scottish Gaelic: needs collation
ast Asturian: needs collation, ordinals*
ccp Chakma: needs plurals, collation, ordinals*, romanization*.
Note: the lack of plurals means that they may need to be fleshed out and the coverage reevaluated.
yue_Hans Cantonese (Simplified): needs collation.
nn Norwegian Nynorsk: needs ordinals* (may be same rules as nb)
br Breton: needs collation, ordinals*